Synthesis and characterization of a noncentrosymmetric layered bismuth tellurium oxide nitrate

5^th International Conference on Organic and Inorganic Chemistry

July 12-13, 2018 | Paris, France

So Yon Lee and Kang Min Ok

Chung-Ang University, South Korea

Posters & Accepted Abstracts: J Chemical Sci

Abstract :

Materials crystallizing in noncentrosymmetric (NCS) structures may show certain properties such as pyroelectricity, piezoelectricity, ferroelectricity and nonlinear properties. To achieve a macroscopic NCS structure, bismuth, tellurium and NO3- were used in the synthesis as constituents. Since the lone pairs on bismuth and tellurium are stereochemically active, they can exhibit asymmetric environment. The �?�?�?-conjugated electron in the NO3 group can also facilitate the nonlinear optical property. The hydrothermally synthesized material reveals a layered nonpolar structure with a weak hydrogen bond interaction. The compound crystallizes in the orthorhombic space group, P-21-21-21. Two types of existing telluriums, Te4+ and Te6+ show see-saw and octahedral coordination environment with oxide ligands, respectively. Bi3+ cations are linked to oxygen atoms and form BiO9 and BiO10 polyhedra. NO3- is connected to the bismuth atoms. Powder second-harmonic generation (SHG) measurements indicate that the NCS material has a SHG efficiency of 20 times that of �?�?�?±-SiO2

Biography :

So Yon Lee has completed her Bachelor’s degree at Chung-Ang Univeristy and is currently on her Master’s degree at Chung-Ang University. She is advised by Prof. Kang Min Ok in the inorganic chemistry labratory. So, she is working on the synthesis and characterization of new noncentrosymmetric materials.

E-mail: soyon29@naver.com